We can't see your return. If your figures are correct, you owe what you owe.
Remember that if you get a tax refund, what that really means is that you paid too much to the government during the year. They kept your money as an interest-free loan, and they graciously give it back when you file your return. If you owe (for example) $2000 in taxes, you can have $39 per week of withholding, and get no refund, or you can have $139 per week of withholding and get a $5000 refund. But you have less money each week, because you over-paid the government in every paycheck.
Also, you got $10,000 of free money for health insurance, and might have to pay back $1500 of it. You still got $8500 of free money.
Depending on your overall income and other situations, you might have to repay part of the insurance subsidy you got earlier in the year, which was based on your estimated future income. If your actual income was higher than the estimate, you might be entitled to less credit.
